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经过修改后的Hf(IV) 金属有机框架和相关的基托桑基复合膜的超高质子导电性

Xin Chen¹, Shuai-Long Zhang¹, Shang-Hao Xiao¹

¹College of Chemistry and Green Catalysis Centre, Zhengzhou University, Zhengzhou 450001, Henan, P. R. China.

ACS applied materials & interfaces

|July 18, 2023

概括

研究人员开发了新的质子交换膜,通过将改性基金属有机框架 (MOFs) 化成. 这些复合膜表现出增强的质子导电性,显示了燃料电池应用的前景.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
纳米技术纳米技术

背景情况:

质子交换膜对于燃料电池至关重要.
金属有机框架 (MOF) 由于其结构和稳定性,具有作为复合膜填充剂的潜力.
基于哈夫尼的MOF (Hf-MOF) 由于高孔隙性和稳定性而特别有希望.

研究的目的:

制造和研究以Hf为基础的MOF合基托复合膜,以提高质子导电性.
用于化学修改Hf-UiO-66-(OH) 2和Hf-UiO-66-NH2 MOF,以提高它们的质子导电性.
调查MOF兴奋剂对膜稳定性和质子导电性的影响.

主要方法:

基于Hf的MOF (Hf-UiO-66-(OH) 2和Hf-UiO-66-NH2) 的化学修饰,使用连接体设计策略引入-COOH单元,产生SA-1和CBD-2.
通过造方法制造复合膜 (CS/SA-1和CS/CBD-2).
复合膜的质子导电性 (σ),稳定性和激活能的表征.

主要成果:

修改后的MOFSA-1和CBD-2的质子导电率分别为1.23 × 10^-2和0.71 × 10^-2 S cm^-1.
复合膜CS/SA-1和CS/CBD-2的稳定性和质子导电性与整洁的基托基质组相比有所改善.
性能最好的复合膜在100°C/98%RH下达到10^-2 S cm^-1以上的质子导电率.

结论:

将化学修饰的基于Hf的MOF转化为素是提高复合膜的质子导电性和稳定性的有效策略.
该研究提出了一种新的MOF化学修饰方法,以优化质子导电性.
这些MOF合复合膜显示出未来燃料电池应用的巨大潜力.

关键词:

在CS复合膜中使用复合膜.基于哈夫的MOFs可以使用.这是一个机制机制.在后修改后的修改.质子传导导的质子传导.

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